brochure Image reproduction technology
Six color printing, English name: six color printing Definition: to improve the four-color printing of the Council and the growth of two kinds of spot color full-color copy of the printing essentials. Hexachrome (hexachrome), which was developed by the United States Pantone in 1995 to grant the strange 6-color ink held by the printing method. In addition to black and blue, other color ink contains fluorescent pigments, which is characterized by the album printing has a very bright colors. Following the operation of Pantone, the six inks used are cyan, magenta, yellow, black, orange and green six-color inks. Color printing performance printing materials are everywhere, different typical six-color printing performance printing material is also not the same, as the album printing, non-woven printing, stickers printing, stickers printing, etc. can be. Book printing four-color printing of the lack of:
Four-color printing is an economic, skill can be received on the form. It is widely recognized by the printing form, but also to achieve some color reproduction. However, four-color overprint also exists a lot of technical defects.
Although in recent years, image reproduction technology has been greatly improved, but the four-color copy is still a very stable process, it is necessary to control too many factors. What is more, it produced in the printing of moire and network expansion is very large, resulting in the album printed image either peaceful, or too much contrast. In addition, with four-color process, some visible colors can not be copied out.
Therefore, the four-color printing is difficult to hold the quality of the control. In the printing press, the color probably produce repeated bias, and even to the beyond recognition. This is due to a lot of environmental and physical composition of the formation of some of the main ingredients are: scraping edge edge wear, the press temperature changes, wire mesh tension, ink function differences and so on.
Color reproduction of the pros and cons of the level depends on the ink can print the color gamut, from this point of view, four-color printing is also a great range of.
On the album printing, although there is no shortage does not affect people's needs, it is not enough to say is not perfect, six colors are in the four-color transformation from the fundamental, can not say that the beginning of a happy tool, Will only slowly become more perfect, printing is also carried out, always perfect itself. Four-color printing is the use of subtractive color three primary colors (yellow, magenta, green) and black for printing. If you use yellow, magenta, cyan, black and ink four other colors of ink to copy the original color of the printing process, it should not be called "four-color printing" and should be called "spot color printing" or "Color printing". The lithography method of full color reproduction is realized by the principle of subtractive color mixing with red, green and blue primary colors and black pigment (ink or dye). But also refers to the use of black, blue, brown, green four kinds of ink to achieve the map copy lithography method, it is China's large-scale topographic map often used printing methods, and a unified color standard. The elements of the use of color for the provisions of: objects, contours and notes with the use of black; water line, single line and its annotation with blue, water part of the general use of 100 lines / inch 15% of the blue network ; Contour lines and special geomorphic symbols and their annotation, the road within the stained with brown; forest stains with 100 lines / inch green cable or network.